<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div class="container">
        <div class="stormy"></div>
    </div>
    <style>
        body{
    background: rgba(73,74,95,1);
}

.container{
    width: 170px;
    height: 170px;
    position: relative;
    margin: 250px auto;
}
.stormy{
    width: 50px;
    height: 50px;
    position: absolute;
    left: 80px;
    top: 70px;
    margin-left: -60px;
    background: #222;
    border-radius: 50%;
    box-shadow: #222 64px -15px 0 -5px,
        #222 25px -25px,
        #222 30px 10px,
        #222 60px 15px 0 -10px,
        #222 85px 5px 0 -5px;
    animation: stormy 5s ease-in-out infinite;
}

@keyframes stormy{
    50%{
        transform: translateY(-20px);
    }
}
.stormy::after{
    content: '';
    width: 120px;
    height: 15px;
    position: absolute;
    left: 5px;
    bottom: -60px;
    background: #000;
    border-radius: 50%;
    opacity: 0.2;
    transform: scale(0.7);
    animation: stormy_shadow 5s ease-in-out infinite;
}

@keyframes stormy_shadow{
    50%{
        transform: translateY(20px) scale(1);
        opacity: 0.05;
    }
}
.stormy::before{
    display: block;
    content: '';
    width: 0;
    height: 0;
    position: absolute;
    left: 57px;
    top: 70px;
    border-left:  0px solid transparent;
    border-right: 7px solid transparent;
    border-top: 43px solid yellow;
    box-shadow: yellow -7px -32px;
    transform:  rotate(14deg);
    transform-origin: 50% -60px;
    animation: stormy_thunder 2s steps(1, end) infinite;
}

@keyframes stormy_thunder{
    0%{
        transform: rotate(20deg);
        opacity: 1;
    }
    5%{
        transform: rotate(-34deg);
        opacity: 1;
    }
    10%{
        transform: rotate(0deg);
        opacity: 1;
    }
    15%{
        transform: rotate(-34deg);
        opacity: 0;
    }
}
    </style>
</body>
</html>